1121001541 has 16 divisors (see below), whose sum is σ = 1261951488. Its totient is φ = 986924800.

The previous prime is 1121001523. The next prime is 1121001587. The reversal of 1121001541 is 1451001211.

1121001541 = T₁₄₂₇₁ + T₁₄₂₇₂ + ... + T₁₄₂₈₁.

It is a cyclic number.

It is not a de Polignac number, because 1121001541 - 2²¹ = 1118904389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121001241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52716 + ... + 70858.

It is an arithmetic number, because the mean of its divisors is an integer number (78871968).

Almost surely, 2^1121001541 is an apocalyptic number.

1121001541 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1121001541 is a deficient number, since it is larger than the sum of its proper divisors (140949947).

1121001541 is a wasteful number, since it uses less digits than its factorization.

1121001541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18332.

The product of its (nonzero) digits is 40, while the sum is 16.

The square root of 1121001541 is about 33481.3610983783. The cubic root of 1121001541 is about 1038.8082814627.

Adding to 1121001541 its reverse (1451001211), we get a palindrome (2572002752).

The spelling of 1121001541 in words is "one billion, one hundred twenty-one million, one thousand, five hundred forty-one".